Valve silencer and shock resistor unit



Jan. 20, 1953 A, sc 2,625,919

VALVE SILENCER AND SHOCK RESISTOR UNIT Filed June 13, 1949 Fig.

/4 I7 II 5 I n ventor August M. Schmidt Patented Jan. 20, 1.953

UNITED STATES PATENT OFFICE VALVE SILENCER AND SHOCK RESISTOR UNITAugust M. Schmidt, Gary, Ind. Application June 13, 1949, Serial No.98,781

1 Claim.

The present invention relates to new and useful improvements in valvesfor internal combustion engines and more particularly to a valvesilencer and shock-resisting valve tappet for the valve stem.

An important object of the invention is to provide a valve silencer andshock resister for the valve stem carried by the valve tappet andincluding the provision of a plurality of superposed thin metallicwashers between which a film of oil works during the operation of thevalve and which is compressed by the valve stem durin the closing actionof the valve to resist the shock and reduce the usual noise of the valveaction.

A further object of the invention i to provide a valve silencer forvalve tappets wherein the number of superposed silencing and shockresisting washers may be readily increased or decreased in accordancewith variations in the tension of the valve spring.

A still further object is to provide a device of this character ofsimple and practical construction, which is eflicient and reliable inoperation, relatively inexpensive to manufacture and otherwise welladapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view showing the valve silencer inassembled relation with respect to a valve;

Figure 2 is an enlarged vertical sectional view of the valve silencingand shock resisting unit secured to a valve tappet; and

Figure 3 is a group perspective view of the valve silencing and shockresisting unit.

Referring now to the drawing in detail wherein, for the purpose ofillustration, I have disclosed a preferred embodiment of the invention,the numeral 5 designates generally the valve silencing and shockresisting unit and which comprises an adjusting screw 6 having ahexagonal wrench-engaging fiat top head I and provided with a centralbore 8 extending upwardly through the head.

The under side of head 'I is formed with an annular oil groove orchannel 9 from which a pair of passages it! lead upwardly through thehead and at diametrically opposite sides thereof.

A plurality of relatively thin metal washers l I, preferably constructedof brass, are positioned on top of head I and are formed with openingsl2 aligned with passages It. A substantially mushroom-shaped bevel edgecap 13 has its head portion It positioned on top of the group of washersII and its stem portion 15 slidably positioned in bore 8 of screw 6. Thehead portion M of the cap [3 is also formed with opening [6 aligned withthe openings of the washers H and head 1 and cotter pins or the like l1,smaller than the passages l0 and openings 12 and I6 are insertedupwardly through the aligned openings to secure head I, washers H andhead M in assembled relation, as shown in Figure 2 of the drawings, saidpins being bent outwardly and downwardly over the beveled edge of thecap l3 to secure the pins in place.

The top of head M of cap I3 is flat, as shown at [8, for contact withthe lower end of a valve stem IQ of an internal combustion engine.

In the operation of the device, the screw 6 is threaded into the upperend of a valve tappet 20 of conventional construction and with thewashers II and cap l3 secured in assembled relation on the head I of theadjusting screw and the screw 6 secured in adjusted position on thetappet and locked by the usual lock nut 2 I During action of the valveand tappet, oil works into groove 9 and upwardly through passage ISbetween the washers II to provide a film of oil between the washers andas the valve stem I9 strikes cap I3, the oil is compressed between thewashers to take up the shock of the valve stem and to reduce the noiseof the valve action.

Any desired number of washers l i may be easily and quickly placed inposition on the silencing and shock resisting unit 5 in accordance withvariation in the tension of the valve spring 22.

In view of the foregoing description taken in conjunction with theaccompanying drawings, it is believed that a clear understanding of thedevice will be quite apparent to those skilled in this art. A moredetailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shownand described a preferred embodiment of the invention, the same issusceptible to certain changes fully comprehended by the spirit of theinvention as herein described and within the scope of the appendedclaim.

Having described the invention, what is claimed a new is:

A valve silencer comprising a valve tappet, screw having a fiat top withvertical oil passages in said top and an axial through oil passing boretherein, a stack of disks on said head in flat engagement with the lowerdisk flatly engaging said top, said disks having vertically aligned oilpassing openings therein registering with the oil passages in said head,a bevel edge mushroom type member seated flat on the to disk of thestack with vertical oil passing openings therein registering with saidopenings in the disks, and pins extending through said passages andopenings and securing said head, disks and member together, said pinsbeing smaller than said passages and openings to permit oil to passthrough said passages and openings.

AUGUST M. SCHMIDT.

4 REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,673,478 Addyman et a1. June 12,1928 1,784,125 Wilson et al. Dec. 9, 1930 1,913,241 Kuse June '6, 19332,044,598 Wallace June 16, 1936 2,206,869 Banker July 9, 1940 2,240,299Holmes et a1. Apr. 29, 1941 FOREIGN PATENTS 'Number Country Date 345,262Great Britain Mar. 16, 1951

